Well this is exciting and slightly weird, apparently producers of Star Wars: Rogue One are planning on using CGI to include Peter Cushing in the new Star Wars spin off.

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“This is one of the most complex and costly CGI re-creations ever,” the source said. “Cushing is a pivotal plot line as he was the one to create Darth Vader and there’s a whole back story that will come out.”
One major issue with the CGI resurrection is that Cushing, who died in 1994, reportedly wore slippers on the set of George Lucas’ space saga opener because the poorly fitting leather riding boots originally allocated to Tarkin were so uncomfortable. The Englishman was therefore only shot from the ankles upwards, and no Star Wars footage exists of his feet.